Our office is outdoors with glare all day. Certainly going to protect my eyesight. Glasses are not issued for the most part, unless it is a specialty type of unit. Marine units are issued glasses for the increased glare. MC riders are issued glasses that are safety sunglasses, to prevent a stone in the eyeball.
Quite a few officers that wear glasses have the lenses that automatically tint themselves pending the brightness.
Most of us just buy cheapy glasses as you set them down in the car, forget them, fall on the floor, slide across the dash or whatever. Certainly with not going to spend $150 on a pair of Oakleys, when a set of safety glasses runs $8 at a local safety store. If they get lost, broken or scratched....not out a lot of coin.
Here can buy a pair....Nascar GT sunglasses
http://www.safetyglassesusa.com/5329224.html
Just remembered most truckers wear sunglasses and seems every road construction person has them too. Rarely do I see a boater without shades either.
Above is merely a suggestion/thought and in no way constitutes legal advice or views of my employer. www.OHTA.ca